在HCI0中连接的BlueZ-pyDbus 2客户端

问题描述

我已成功通过pyDbus同时连接到2个BLE服务器。但是，当我想读/写第一个BLE服务器时，我无法这样做。我检查了此问题，发现第二个BLE服务器连接克服了第一个问题。随附的是代码段：

def device_Init(macAdd):

     adapter = bus.get('org.bluez','/org/bluez/hci0')
     dev = bus.get('org.bluez','/dev_(the macAdd)')
     mngr = bus.get('org.bluez','/')
    
     dev.Connect()

然后当然需要断开连接，然后发出dev.disconnect()

如何在两个连接的设备之间分离连接，读取/写入和断开连接的部分？我试图创建另一个功能，但没有成功。

解决方法

代码的问题在于，dev属性在第二次使用其他设备地址创建时会被覆盖。您可以为第二台设备设置第二个变量。

但是，更Python化的方法可能是让您实例化两次的类。

下面是一个示例：

from time import sleep
import pydbus

bus = pydbus.SystemBus()

mngr = bus.get('org.bluez','/')

def get_characteristic_path(dev_path,uuid):
    mng_objs = mngr.GetManagedObjects()
    for path in mng_objs:
        chr_uuid = mng_objs[path].get('org.bluez.GattCharacteristic1',{}).get('UUID')
        if path.startswith(dev_path) and chr_uuid == uuid:
           return path

class MyRemoteDevice:
    CHAR_UUID = 'e95dda90-251d-470a-a062-fa1922dfa9a8'

    def __init__(self,mac_addr):
        device_path = f"/org/bluez/hci0/dev_{mac_addr.replace(':','_')}"
        self.device = bus.get('org.bluez',device_path)

        # Placeholder for characteristic details
        self.characteristic = None

    def _get_gatt_details(self):
        char_path = get_characteristic_path(self.device._path,MyRemoteDevice.CHAR_UUID)
        self.characteristic = bus.get('org.bluez',char_path)


    def connect(self):
        self.device.Connect()
        # Check GATT services have been resolved before continuing
        while not self.device.ServicesResolved:
            sleep(0.25)
        self._get_gatt_details()

    def disconnect(self):
        self.device.Disconnect()

    def read(self):
        return self.characteristic.ReadValue({})

    def write(self,new_value):
        self.characteristic.WriteValue(new_value,{})


my_first_dev = MyRemoteDevice('11:22:33:44:55:66')
my_second_dev = MyRemoteDevice('22:33:44:55:66:77')

my_first_dev.connect()
my_second_dev.connect()

print(my_first_dev.read())
print(my_second_dev.read())

my_first_dev.disconnect()
my_second_dev.disconnect()